Key term
CCEA A-Level Technology and Design 8900
Material Selection and Wood
Metals
Plastics
Composite and Emerging Materials
Processing Materials
Product Analysis and Design Communication
Design for Manufacture, Quality and Safety
Electronic Control SystemsOption A
Topic overviewControl systems, feedback and electronics safetyResistors, Ohm's law and power ratingsCapacitors and RC timingPotential dividers, sensors and comparatorsSwitches, pull-up and pull-down resistorsOutput devices and LEDsTransistors, Darlington pairs and thyristorsLogic gates, truth tables and flip-flops555 monostable and astable timers
Microelectronic Control SystemsOption A
Topic overviewMicrocontroller systems, ADCs and DACsStrain gauges and bridge circuitsOptical switches, encoded discs and Schmitt triggersOp-amp amplifiers and gainZener diodes and voltage regulatorsKarnaugh maps and binary countersSeven-segment, LCD and dot matrix displaysPIC flowcharts and programmingDC motors, stepper motors and driver circuits
Mechanical and Pneumatic ComponentsOption B
Topic overviewOpen and closed loop mechanical and pneumatic controlSafe working with compressed air and mechanismsLevers, linkages and momentsGear types and gear trainsPulleys, belts, chains and shaft fixingsCams, cranks and converting motionCompressed air supply and pneumatic valvesCylinders, shuttle valves, restrictors and reservoirsPneumatic circuits for logic, timing and speed control
Mechanical and Pneumatic SystemsOption B
Topic overviewHydraulics, system limitations and plant safetyTorque, work, power and air consumptionVacuum handling, proximity sensors and 5/3 valvesSequential and cascade pneumatic circuitsCam profiles and follower displacement diagramsGear geometry, pulley blocks and ratchetsToggles, treadles, shafts and couplingsFriction, brakes and clutchesBearings, lubrication and seals
Designing and Manufacturing ProductsOption C
Topic overviewResearch, questionnaires and specificationsIdea generation, critiques and computer simulationManufacturing planning and product evaluationCFRP, GRP, Kevlar and tungsten carbideSmart materials, nanotechnology and biophotovoltaicsIsometric, perspective and assembly drawingLaminating, steam bending, cutting and printing processesRisk assessment and product safety lawScales of production, JIT and cell productionQuality assurance, ISO 9001 and continuous improvementDesign influences and intellectual property rights
Product Design in Industry and SocietyOption C
Topic overviewLife-cycle environmental impact and climate changeThe 6Rs, waste and environmental legislationSustainable metals, plastics and degradable polymersProduct life cycles, consumer types and relaunchesCAD, CAM, 3D scanning and quick-change mouldingMarket pull, technology push and market strategyPrice, place and promotionJigs, fixtures and ICT in quality controlDesign for maintenance, inclusion and scale productionRendering, typography and presentationDyson, Baylis, Memphis and Apple
Product Development
Product and System Design and Manufacture
Metals
Aluminium, copper, brass and zinc
- 3 things to know
- AS 1 Paper 1
Overview
The properties and uses of aluminium and duralumin, copper and work hardening, brass for fittings and instruments, and zinc coatings and die-cast zinc alloys.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
Why does aluminium resist corrosion?
Key term
Give two uses of aluminium and link each to a property.
Questions from this subtopic
Each one with the model answer underneath.
- 1
Describe the properties of pure aluminium.
Model answer
Aluminium is a light, silvery metal with a density far lower than that of steel. Aluminium is ductile, malleable and a good conductor of heat and electricity.
- 2
Why does aluminium resist corrosion?
Model answer
Aluminium reacts with air to form a thin, tough layer of aluminium oxide. The oxide layer seals the surface and stops further corrosion.
- 3
Give two uses of aluminium and link each to a property.
Model answer
Drinks cans are made from aluminium because it is light, malleable and non-toxic. Window frames are made from aluminium because it resists corrosion and extrudes into complex sections.
- 4
What are the working characteristics of aluminium?
Model answer
Aluminium is easy to cut, file, bend and machine, and it casts well as an alloy. Aluminium is difficult to weld and needs special equipment to join by heat.
- 5
Why are aluminium alloys used instead of pure aluminium for aircraft and bicycle frames?
Model answer
Pure aluminium is soft and relatively weak. Alloying with elements such as copper, magnesium and silicon greatly increases strength while keeping the weight low.
- 6
What is duralumin?
Model answer
Duralumin is an aluminium alloy containing about 4% copper, with small amounts of magnesium and manganese. Duralumin is strong and light and is used in aircraft structures.
Other ways to work this
The same content, four other ways.
What is inside Levo
Six ways to work the same material.
Every question in Metals, on a schedule.
Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.
Or £46 a year, about £3.83 a month. Cancel anytime.